Re: [TCLCORE] PURIFY and unloading extensions issue (?)

[Neophytos D. <neo...@gm...>]

Not 100% sure but this seems to be an issue with the extensions as they
were using CreateThreadExitHandler instead of CreateExitHandler.

Sorry for wasting your time.

- Neophytos

On Mon, Jul 29, 2024 at 4:29 AM Neophytos Demetriou <neo...@gm...>
wrote:

> Hi,
>
> When the PURIFY flag is used Tcl_Exit calls Tcl_Finalize that in turn
> calls TclFinalizeSynchronization, which sets tsdGlobal.key to NULL via
> TclFinalizeThreadStorage.
>
> Then, when it afterwards tries to unload extensions, it attempts to use
> the TSD (thread-specific data) again and because tsdGlobal.key is NULL, the
> AddressSanitizer complains about a NULL pthread key.
>
> I was not able to track where the TSD is used during unloading or if this
> is an issue with the extensions being used and whether they have to unload
> in a specific way. As a consequence I stopped using the PURIFY flag but if
> anyone has any suggestions, please let us know.
>
> Kind regards,
> Neophytos
>